Working on a Skyscraper in the Early Years of the XX Century - CloudStack Collab Conference Europe

Working on a Skyscraper in the Early Years of the XX Century - CloudStack Collab Conference Europe
source here :
https://www.youtube.com/watch?v=RRbjGY7AdBQ&index=42&list=PLbzoR-pLrL6ruJrhXZ-jSSYw0m3WfK4ea